Who but Will.i.am could get Mick Jagger to rap – yes, rap – over a glitzy Ibiza beat in 2011? Who else would even think of such a wonderfully batshit idea? On the first single from his forthcoming solo LP #willpower, the Black Eyed Peas mastermind strews dodgy rhymes ("I woke up in the morning/Hard like morning wood in the morning") over diamond-bright synths, while J. Lo handles the efficient hook. It all feels a bit perfunctory – except for Mick's guest verse, a kitschy delight delivered in a "Midnight Rambler" snarl.

Listen to "T.H.E. (The Hardest Ever)":

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“1999”

“I don’t consider myself a great poet,” Prince told Rolling Stone. “I just know I’m here to say what’s on my mind.” In the case of the apocalyptic party anthem “1999,” he was worried about then-president Ronald Reagan’s foreign policies. The song’s melody is based on a riff borrowed from the Mamas and Papas’ “Monday, Monday,” and Prince originally envisioned the first verse with three-part harmony but later split the vocals between himself and members of the Revolution. Because Warner Bros., with whom Prince was locked in a contractual battle, owned the original’s masters, Prince rerecorded the song and appropriately released that version in 1999.